|
Which one between Na and ${{Na}^{+}}$ would have more size ? Why?
|
|
0
|
733
|
October 20, 2016
|
|
Due to completely filled s-subshell in alkaline earth metals
|
|
1
|
601
|
October 20, 2016
|
|
The calculated electron gain enthalpy values
|
|
1
|
2049
|
October 20, 2016
|
|
Second ionization energy of an element
|
|
1
|
603
|
October 20, 2016
|
|
All alkali metals are solids but hydrogen
|
|
1
|
2542
|
October 20, 2016
|
|
Do you know why Newlands' proposed the law of octaves?
|
|
1
|
2794
|
October 20, 2016
|
|
The relative atomic mass of the middle element in each triad
|
|
1
|
524
|
October 20, 2016
|
|
What relation about elements did Dobereiner want to establish?
|
|
0
|
1457
|
October 20, 2016
|
|
Find out valencies of first 20 elements
|
|
0
|
40265
|
October 20, 2016
|
|
Some main group elements of s-block and p-block
|
|
1
|
909
|
October 20, 2016
|
|
Observe the following table
|
|
1
|
895
|
October 20, 2016
|
|
What are metals and non-metals?
|
|
0
|
665
|
October 20, 2016
|
|
What is Newlands' law of octaves?
|
|
0
|
2564
|
October 20, 2016
|
|
What is Dobereiner triad ? Given two examples to it
|
|
0
|
4172
|
October 20, 2016
|
|
What is modern periodic law?
|
|
0
|
576
|
October 20, 2016
|
|
State Mendeleeff’s periodic law?
|
|
0
|
645
|
October 20, 2016
|
|
How are the elements divided into s, p, d and f - blocks
|
|
1
|
568
|
October 20, 2016
|
|
Explain the limitations of Mendeleeffs periodic table
|
|
0
|
560
|
October 20, 2016
|
|
What is electronegativity?
|
|
1
|
6828
|
October 20, 2016
|
|
What is screening effect or shielding effect?
|
|
0
|
986
|
October 20, 2016
|
|
Explain the construction of periods in Modern periodic table
|
|
0
|
2353
|
October 20, 2016
|
|
Explain the salient features and achievements
|
|
1
|
809
|
October 20, 2016
|
|
Collect information regarding metallic character of elements
|
|
1
|
6757
|
October 19, 2016
|
|
Collect the information about reactivity of VIIIA group elements
|
|
1
|
5884
|
October 19, 2016
|
|
Aluminium does not react with water at room temperature
|
|
1
|
3373
|
October 19, 2016
|
|
In period 2, elements X is to the right of element Y
|
|
1
|
3432
|
October 19, 2016
|
|
How the positions of elements in the periodic table
|
|
1
|
918
|
October 19, 2016
|
|
Comment on the position of hydrogen in periodic table
|
|
0
|
3663
|
October 19, 2016
|
|
Without knowing the electronic configurations of the atoms of elements
|
|
1
|
1475
|
October 19, 2016
|
|
How do you appreciate the role of electronic configuration of the atoms of elements in periodic classification?
|
|
0
|
3756
|
October 19, 2016
|